Air release unit



FIG. 1 is a top, right, and rear perspective view of an air release unit, according to the present invention;

FIG. 2 is a bottom, left, and rear perspective view thereof;

FIG. 3 is a top, right, and front perspective view thereof;

FIG. 4 is a bottom, right, and front perspective view thereof;

FIG. 5 is a front elevation thereof;

FIG. 6 is a rear elevation thereof;

FIG. 7 is a right side elevation thereof, the left side elevation being a mirror image thereof;

FIG. 8 is a top plan thereof; and,

FIG. 9 is a bottom plan thereof. 

CLAIM We claim the ornamental design for an air release unit, as shown and described. 